Shulchan Arukh Orach Chayim · Siman 493

Shulchan Arukh Orach Chayim 493 — English translation

Translation: Wikisource Shulchan Aruch. Section numbers match the Hebrew text above.

1. 1It is customary not to get married between Pesach and Shavuot, until Lag BaOmer (the 33rd day), because during that time, the students of Rabbi Akiva died. However, to do "erusin" and "kiddushin" (engagement and betrothal) is OK. And even for "nisuin" (marriage), if someone did so, we do not punish him. Rema: however, from Lag Ba'Omer onwards, all this is permitted (Abudraham, Beit Yosef & Minhagim).
2. 2It is customary not to cut one's hair until Lag BaOmer, since it is said that that is when they stopped dying. One should not cut one's hair until the 34th day, in the morning, unless the 33rd day falls on Friday, in which case one may cut one's hair then, in honor of the Sabbath ("kavod Shabbat"). Rema: But in these countries, we do not follow the custom he advocates; rather, we cut our hair on the 33rd day, and we rejoice a bit, and we do not say Tachanun (Maharil and Minhagim). And one should only cut one's hair on the 33rd day itself, but not on its evening. However, if it falls on Sunday, our custom is to cut our hair on Friday in honor of the Sabbath (Maharil). Someone who is performing a brit milah (i.e., the sandak, mohel and the infant's father), or circumcizing his son, is allowed to cut his hair during sefirah in honor of the circumcision (Hagahot Minhagim).
3. 3Some have the custom to cut their hair on Rosh Chodesh Iyyar, but this is a mistake. Rema: However, in many places, the custom is to cut their hair until Rosh Chodesh Iyyar, and they do not cut their hair from Lag BaOmer forward, even though it is permitted to cut one's hair on Lag BaOmer itself. But those places who have the custom to cut their hair from Lag BaOmer onwards, do not cut at all after Pesach until Lag BaOmer. And within one city, it should not be that some follow one custom, and some follow another, because of "lo titgodedu" ("do not cut yourselves" - Deut. 14:1, interpreted in Yevamot 13b as "lo te'asu agudot agudot," "Do not become seperate groups"); all the more so, one may not follow both leniencies.
4. 4Women have the custom not to do work from Pesach until Shavu'ot, from sunset onwards.

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